Gardeners' World presenter Monty Don shared his expert tips on how to manage rose black spot treatment, a fungal disease that thrives in warm, humid and wet weather conditions07:50, 26 May 2026Monty Don offered his expert guidance on tackling black spot on roses as the UK continues to enjoy sweltering temperatures.‌The scorching heat will continue to blast the UK today, after the hottest day on record for May was recorded on Monday (May 25). The conditions could present a specific challenge for roses in gardens.‌Black spot is a fungal infection that results in dark patches appearing on the leaves and stems of rose plants. It flourishes during spells of warm, humid and damp weather, with the affected foliage often yellowing and falling off.‌Gardeners' World host Monty has now offered advice on how to handle black spot, explaining it depends on personal tolerance thresholds.The 70-year-old said: "A lot of plants get black spot, but it doesn't affect the flowering and doesn't affect the health of the plant. It's just unsightly and that, personally, I can tolerate.‌"If it's defoliating completely, if a plant is suffering and looking bad, and other roses near it are not suffering from it, then that's because the plant is particularly prone to it, so just get rid of it."However, if black spot has affected all your roses, Monty warned, "you've got a problem".Speaking on the BBC Gardeners' World Magazine podcast, he suggested: "The only practical thing you can do is, don't water overhead. You can't stop the rain, but don't wet the leaves, keep the leaves dry.‌"So water at the base, gather up all the affected leaves that drop and burn them, don't put them on the composite." Monty continued to share further advice on keeping gardens in good shape as the colder months approach. "In winter, rake the ground around the plant thoroughly to disturb the spores. Leave it bare over the winter months, then mulch it thickly in early spring."And the cold, if we get a really cold snap, that will affect the spores that will be in the ground."But, the truth is, if you live with roses, you live with it to a certain extent."Article continues belowIt comes after a Senior Lifestyle journalist recently tried another of Monty Don's tricks to remove moss from lawns without a rake.Angela Patrone's lawn had been overrun by moss and weeds since the winter months, so she decided to use Monty's tips on reviving it through scarification and aeration.